a) In your spare time you enjoy building electrical circuits, typically you use a battery to power these circuits; however, recently you have noticed some unpredictable results and have concluded that there must be a problem with the battery. i) To test the performance of the battery you have used a potentiometer, voltage probe and oscilloscope to create the plot shown in Figure Q2-1. Using the plot, create a model for the battery comprising of an ideal voltage source and series resistance. 10- ii) Voltage 8 across terminals 6- (V) 10 40 Figure Q1-2 b) From the model you constructed in part ai, it is clear that the battery is no longer suitable to power your circuits. As an alternative you've decided to construct your own DC power supply using a circuit you found in a text book, shown in Figure Q2-2. Each capacitor used has a maximum voltage rating of 20 volts. i) All of the components to the left hand side of the 22 2 resistor can be grouped together and considered as a single 34 V ideal voltage source. Redraw the circuit showing this voltage source and determine what the current flow through the 22 2 resistor would be if the terminals were to be shorted together. When using the DC power supply you notice a considerable level of voltage ripple on the output, this suggests that the smoothing capacitance at the output of your power supply is insufficient. You decide to replace the 10 F capacitor with a 47F to improve the situation. The only 47F capacitor you have available has a maximum voltage rating of 15V, is it safe to use this capacitor in series with the existing 22 F capacitor? 20 30 50 Current drawn (mA) 60